Structural features of Na2WO4–MOx/SiO2 catalysts in oxidative coupling of methane reaction

Structural features of Na2WO4–MOx/SiO2 catalysts in oxidative coupling of methane reaction

Abstract

Oxidative coupling of methane conversion (OCM) and C2 selectivity on Na2WO4–MOx/SiO2 catalysts, where M is V, Cr, Mn, Fe, Co or Zn are related to surface morphology, textural properties and reduction behavior of the catalysts. The catalysts are prepared by sequential impregnation of aqueous solution of metal salts and then sodium tungstate on the silica followed by drying and calcination at 800 °C for 8 h. Methane conversion increases with the transition metal compound of the catalysts in the order of V ∼ Cr ∼ Zn